Inder singh has mentioned this “kala afghana” several times in several forum site. Google searched an interesting article on him.
Note to Inder singh: I dont think all of “dasam granth” work is penned by dasma Guru jee. Only a very small section may be as principal harbhajan singh states in his article
Except for 50 pages, the granth contradicts the ideology of Guru Granth Sahib. As 674 pages are devoted to extolling Avtaars, etc. and 53 pages praise Chandi and Durga (Chandi Chritras and Var Durga ki). While 615 pages relate to the utterly obscene Charittro Pakhyan.
The conclusive evidence is that whereas the 50 pages in every way synchronise with the bani of Guru Granth Sahib, the main body of the granth relating to Devis and Avtaars and Charittro Pakhyan are evidently in contradiction to that ideology. Hence, when the acid test is applied, except the 50 pages of the bani, the writings in the granth are difficult to accept as creations of the Tenth Master.”